Merge with http://www.jdl.com/software/u-boot-86xx.git

1 files changed, 127 insertions, 0 deletions

diff --git a/cpu/mpc86xx/speed.c b/cpu/mpc86xx/speed.c
new file mode 100644
index 0000000..312ca12
--- /dev/null
+++ b/cpu/mpc86xx/speed.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2004 Freescale Semiconductor.
+ * Jeff Brown
+ * Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
+ *
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <mpc86xx.h>
+#include <asm/processor.h>
+
+
+void get_sys_info(sys_info_t *sysInfo)
+{
+	volatile immap_t *immap = (immap_t *) CFG_IMMR;
+	volatile ccsr_gur_t *gur = &immap->im_gur;
+	uint plat_ratio, e600_ratio;
+
+	plat_ratio = (gur->porpllsr) & 0x0000003e;
+	plat_ratio >>= 1;
+
+	switch (plat_ratio) {
+	case 0x0:
+		sysInfo->freqSystemBus = 16 * CONFIG_SYS_CLK_FREQ;
+		break;
+	case 0x02:
+	case 0x03:
+	case 0x04:
+	case 0x05:
+	case 0x06:
+	case 0x08:
+	case 0x09:
+	case 0x0a:
+	case 0x0c:
+	case 0x10:
+		sysInfo->freqSystemBus = plat_ratio * CONFIG_SYS_CLK_FREQ;
+		break;
+	default:
+		sysInfo->freqSystemBus = 0;
+		break;
+	}
+
+	e600_ratio = (gur->porpllsr) & 0x003f0000;
+	e600_ratio >>= 16;
+
+	switch (e600_ratio) {
+	case 0x10:
+		sysInfo->freqProcessor = 2 * sysInfo->freqSystemBus;
+		break;
+	case 0x19:
+		sysInfo->freqProcessor = 5 * sysInfo->freqSystemBus / 2;
+		break;
+	case 0x20:
+		sysInfo->freqProcessor = 3 * sysInfo->freqSystemBus;
+		break;
+	case 0x39:
+		sysInfo->freqProcessor = 7 * sysInfo->freqSystemBus / 2;
+		break;
+	case 0x28:
+		sysInfo->freqProcessor = 4 * sysInfo->freqSystemBus;
+		break;
+	case 0x1d:
+		sysInfo->freqProcessor = 9 * sysInfo->freqSystemBus / 2;
+		break;
+	default:
+		sysInfo->freqProcessor = e600_ratio + sysInfo->freqSystemBus;
+		break;
+	}
+}
+
+
+/*
+ * Measure CPU clock speed (core clock GCLK1, GCLK2)
+ * (Approx. GCLK frequency in Hz)
+ */
+
+int get_clocks(void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	sys_info_t sys_info;
+
+	get_sys_info(&sys_info);
+	gd->cpu_clk = sys_info.freqProcessor;
+	gd->bus_clk = sys_info.freqSystemBus;
+
+	if (gd->cpu_clk != 0)
+		return 0;
+	else
+		return 1;
+}
+
+
+/*
+ * get_bus_freq
+ *	Return system bus freq in Hz
+ */
+
+ulong get_bus_freq(ulong dummy)
+{
+	ulong val;
+	sys_info_t sys_info;
+
+	get_sys_info(&sys_info);
+	val = sys_info.freqSystemBus;
+
+	return val;
+}